[RFC PATCH] Consolidate SRAM support

[Arnd Bergmann]

On Friday 15 April 2011 15:39:55 Rob Herring wrote:

> On 04/15/2011 08:06 AM, Russell King - ARM Linux wrote:
> > This is work in progress.
> >
> > We have two SoCs using SRAM, both with their own allocation systems,
> > and both with their own ways of copying functions into the SRAM.
> 
> It's more than that. Several i.MX chips use plat-mxc/iram_alloc.c.

There are also non-ARM systems doing something like that,
arch/blackfin/mm/sram-alloc.c comes to mind. On powerpc, the
ppc7410 also has this feature in hardware, but I believe it was
never supported in mainline Linux.

How about putting sram-pool.c into the top-level mm/ directory
and sram-pool.h into include/linux? They seem to be completely
generic to me, aside from the dependency on asm/fncpy.h which
should probably remain arch specific.

As long as CONFIG_ARM_SRAM_POOL (or perhaps just CONFIG_SRAM_POOL)
is selected only by platforms that support it, the dependency
should not hurt.

	Arnd